Cut-out valve



K. J. JOHNSON. cur-our VALV'E.

Patented Feb. 24,1920.

UNITED STATES PATENT OFFICE.

KNUTE J. JOHNSON, OF MINNEAPOLIS, MINNESOTA.

CUT-OUT VALVE.

Application filed February 17, 1919.

out valve, especially adapted for use in con"' nection with the exhaustpipes of internal combustion engines.-

To the above end, generally stated, the invention consists of the noveldevices and combinations of devices hereinafter described and defined inthe claims.

In the accompanying drawings, which illustrate the invention, likecharacters indicate like parts throughout the several views.

Referring to the drawings,

Figure 1 is a fragmentary view showing the invention applied to theexhaust pipe of an internal combustion engine; and

Fig. 2 is a view principally in section taken on the line 22 of Fig. 1.

The numeral 3 indicates the exhaust manifold of an internal combustionengine and leading therefrom is an exhaust pipe which opens into amuflier 5. Rigidly secured to the exhaust pipe l, are two longitudinallyspaced collars 6 and 7. Formed in oneside of the exhaust pipe 4, quiteclose to the collar 7 is a cut-out port 8.

A sleeve-like cut-out valve 9 is mounted on the exhaust pipe 4 betweenthe collars 6 and 7 for opening and closing the cut-out port 8 by anaxial sliding movement on said exhaust pipe. Encircling the exhaust pipe4. and compressed between the collar 6 and adjacent end of the cut-outvalve 9, is a coiled spring 10. This spring 10 yieldingly holds thevalve 9 seated against the collar 7, in which position of said valve,the port 8 is normally closed thereby.

To cause the cut-out valve 9 to freely slide on the exhaust pipe 4, theinner intermediate face thereof is cored out at 11, so that only the endportions of said valve bear on the exhaust pipe 4 at opposite sides ofthe port 8, and thereby form tight joints between said valve and exhaustpipe. It will be noted Specification of LettersPatent.

Patented Feb. 24, 1920.

Serial No. 277,555.

that the bearing surface of the valve 9, adjacent to the collar 7, ismade considerably narrower than the bearing surface at the other endthereof, for the reason that such end of said valve bears against thecollar 7 and thereby afiords an additional tight joint between the valveand exhaust pipe.

The cut-out valve 9 is opened against the tension of the spring 10 by arod 12 actuated by a foot pedal or other suitable means, not shown. Saidpedal will, of course, be provided with suitable means for locking thecut-out valve open. The operatin rod 12 is attached to the cut-out valve9 by orming thereon an eye 13, which fits over a radial stud 14 on saidvalve. 'A cotter pin 15 is inserted through a bore in the stud 14,outward of the eye 13 to hold the rod 12 on said stud.

The above described invention, while extremely simple and of small costto manufacture, has, in actual usage, proven highly eflicient for thepurpose had in view.

What I claim is 1. The combination with the exhaust pipe of an internalcombustion engine, of a stop collar on the exhaust pipe, said exhaustpipe having formed therein in the vicinity of said collar a cut-outport, a sleeve valve surrounding the exhaust pipe with freedom for axialsliding movement thereon, a spring yieldingly holding said valve in aposition to normally close said port and seat against said collar, and aconnection for opening the valve against the tension of the spring.

2. The combination with the exhaust pipe of an internal combustionengine, of a pair of longitudinally spaced stop collars on the exhaustpipe, said exhaust pipe having formed therein between said collars acut-out port, a sleeve-like cut-out valve surrounding the exhaust pipewith freedom-for axial sliding movement thereon, a coiled springencircling the exhaust pipe and compressed between the valve and one ofsaid collars and vieldingly holding said valve against the other of saidcollars to close said port, and a connection for opening the valveagainst the KNUTE J. Jonusou.

Witnesses:

CLARA DEMAREsT, HARRY D. KILGORE.

